Monoazo dyestuffs insoluble in water



Patented Jan. 14, 1941 UNITED STATES PATENT OFFICE .MONOAZO DYESTUFFS INSOLUBLE IN WATER Ernst Fischer, Ofienbach-on-the-Main, Germany, assignor to General Aniline & Film Corporation, a corporation of Delaware No Drawing.

rial No. 254,009. 1938 The present invention relates to monoazo dyestuffs insoluble in water; more particularly it relates to dyestuffs of the following general forwherein X1 stands for hydrogen, an alkyl-, al-

koxy-, aralkoxy-, aryloxy-group or halogen, X2

and X3 represent hydrogen, alkyl-, alkoxy-, 20 aralkoxy-, aryloxy-groups, halogen or one of the groups:

/R1 SO2N R2 25 and /R1 -CON 30 always one of the two substituents X2 and X3, not

both simultaneously, being the group:

R1 -SOzN R2 35 or 40 R1 and R2 being alkyl-, aralkyb, arylor hydroaromatic radicals which may be connected in a heterocyclic ring system; Y stands for methyl, a carboxylic acid ester group or phenyl, and Z for a radical of the benzene series.

45 I have found that valuable pigment dyestufis may be obtained by coupling with a 1-aryl-3- methyl-S-pyrazolone, a 1-aryl-3-ary1-5-pyrazolone, a 1-aryl-5-pyrazolone-3-carboxylic acid ester or. a substitution product thereof the diazo- 50 compound from an amine of the general formula:

Application February 1, 1939, Se-

In Germany February 2,

4Claims. (01. 260-156) wherein X1 stands for hydrogen, an alkyl-, alkoxy-, aralkoxy-, aryloxy-group or halogen, X2 and X3 represent hydrogen, alkyl-, alkoxy-, aralkoxy-, aryloxy-groups, halogen or one of the groups: 5

/R1 SO2N and C ON always one of the two substituents X2 and X3, not both simultaneously, being the group:

1 SO2N.

R1 --0 O N R1 and R2 being alkyl-, aralkyl-, arylor hydroaromatic radicals which may be connected in a heterocyclic ring system, only such dyestufi components being used as do not contain any group lending solubility in water, such as the sulfonic or carboxylic acid group.

The new dyestufis yield vivid yellow and orange tints of good properties of fastness, especially of good fastness to light. They are insoluble in water, but very easily soluble in many organic solvents, such as hydrocarbons, alcohols, esters, ketones and can, therefore, be used for coloring these solvents as well as the lacquers prepared by means of these solvents, such as nitroor acetylcellulose lacquers, films or plastic masses. They are also very suitable for coloring varnishes, candles and fats. Owing to the different substituents present in the dyestuffs, the suitability of the organic solvents named varies, but the most suitable solvents may easily be ascertained by experiment.

In comparison with the dyestufis described in German Patents Nos. 219,846, 236,595, 236,596, 408,505, 472,355, 532,079 and French Patent No. 814,422, the dyestuffs obtainable by the invention are distinguished partly by their enhanced solubility in organic solvents, partly by their better fastness properties, such as higher fastness to light; the dyeings produced on rubber by means 55 of the new dyestufis bleed during the vulcanisation process to a considerably smaller extent.

The following examples serve to illustrate the invention, but they are not intended to limit it thereto:

1. 16.4 grams of 1-amino-4-ethoxybenzene-5- '(sulfonyl-n-dibutylamine) are diazotized in the usual manner. In order to bind the excess of mineral acid, sodium acetate is added to the dia'zo-solution and the whole is then stirred into an aqueous suspension of 8.7 grams of l-phenyl- 3-methyl-5-pyrazolone prepared by dissolving this compound in dilute caustic soda solution and reprecipitating it by means of acetic acid. When the coupling is complete, the dyestuff formed is filtered with suction, washed well and dried. It is a yellow powder which easily dissolves in xylene, acetone and other organic solvents and dyes cellulose ester lacquers very vivid yellow tints of good fastness to light. The dyestuff corresponds with the following formula:

OCzHs -SN (n) N t on J H3OO G 2. 15.7 grams of 1-amino-2-methoxybenzene-5- (sulfonyl-n-dibutylamine) are diazotized as usual. The diazo-solution is made neutral to Congo paper by means of sodium acetate, and ,then stirred into a suspension of 12.2 grams of 1- (2'.5'-dichloro) -phenyl-3-methyl-5-pyrazolone prepared by dissolving this compound in dilute caustic soda solution and reprecipitating it by means of acetic acid. The dyestufi formed is filtered with suction, washed Welland dried. It dissolves easily in butyl acetate, ethyl alcohol,

ethyl acetate and other organic solvents and colors lacquers vivid yellow tints of good properties of fastness.

3. If there are used, in Example 1, instead of 8.7 grams of 1-phenyl-3-methyl-5-pyrazolone, 11.6 grams of 1-pheny1-5-pyrazolone-3-carboxylic acid ethyl ester, a yellow dyestuff having similar properties is obtained; it colors the various organic solvents and the lacquers prepared by means of these solvents tints which are much more reddish than those obtainable with the dyestuff of Example 1.

4. A pigment dyestufi is prepared, in the manner described in Examples 1 and 2, from the diazo-compound of 17.2 .grams of 1-amino-2.5- dimethoxybenzene- 4 -(sulfonyl-n-dibutylamine) and 11.6 grams of 1-phenyl-5-pyrazolone-3-car boxylic acid ethyl ester. It dissolves easily in butyl alcohol, butyl acetate and acetone and colors cellulose ester lacquers orange tints.

5. The pigment dyestufi obtainable, in the manner described in Examples 1 and 2, from the diazo-compound of 10.2 grams of l-aminobenzenel-(carbonyl-N-piperidine) and 8.7 grams of 1-phenyl-3-methyl-5-pyrazolone is a yellow powder, which dissolves easily in organic solvents, such as acetone, xylene, butyl acetate and the like and colors cellulose ester lacquers vivid fast tints.

6. From the diazo-compound of 11.5 grams of 1-amino-2-methoxybenzene-4- (sulfonyl-dimethylamine) and 12.8 grams of 1-phenyl-3-phenyl-5- pyrazolone there is obtained, in the manner described in Examples 1 and 2, a yellow pigment dyestuff of very good fastness to light which dissolves easilyin organic solvents, such as esters, hydrocarbons and the like and colors cellulose ester lacquers vivid yellow tints.

The following table illustrates a number of other monoazo dyestuffs obtainable by the present invention which are likewise easily soluble in solvents usually applied for these purposes and,

have good properties of fastness.

Diazo-compound from- Coupled with- Shade 1-amino-4-ethoxybenzene-5- (sulfonyl-diethylamine) l-amino-4-methoxybenzene-5-(sulfonyl-n-dibutylamine) l-aniino-2.5-dimethoxybenzene-4- (sulfonyl-n-dibutyl amine) 1-amino-2.5-diethoxybenzene-4-(sulfonyl-n-dibutylamine) l-amino-2.4-dimeth oxybenzene-fi-(sulfonyl-n-dibutyl amine) 1-amino-4-phenoxybenzene-5-(sulionyl-n-dibutyl amine) 1-amino-2-ethoxybenzene-5-(sulfonyl-n-dibuytlamine) l-amino-2-benzyloxyben zone-5-(sulfonyl-mdibutylamine) l-ainino-4-benzyloxybenzene 5-(sulfonyl-n-dibutylamine 1-amino-2-ethoxybenzene-5- (sulfonyl-diethylamine) i-amino-2-methoxybenzene-5-(sulfouyl-N-piperidine) 1-amino-2-methoxybenzene-5-(sulfonyl-N- (n) butylaminobenzene). l-aminii-2-methoxybenzene-5- (suli'onyl-N-ethyl-cyclohexylamine l-amino-2-phenoxybenzene-5-(sulfonyl-n-dibutylamine) 1-amino-Z-methylbenzene-5-(sulfonyl-n-dibutylamin l-amino-Z-methylbenzene-5- (sulfonyl-N-metl1yl-2-a1ninonaphthalene). 1-amino-4-chlorobenzene-5- (sulfonyl-dietliylamine) 1-aminobenzene-4- (sulfonyldiethylamine) l-aminobenzene-3-(sulfonyl-diethylamine) l-aminobenzenei- 1-aIninobenzene-3-(earbonyl-diethyl amine) l-arninobenzene-B-(carbonyl-diphenylamine l-amino-2-methylbenzene-S-(carbonyl -N ethyl l nap amine l-amino-Z-methoxybenzene-5-(earbonyl-diethylamine) l-amino-2-methoxybeuzene-5- (carbonyl-N (n)butyla.n1in0- benzene). 1-amino-2-mcthylbenzene-5- (carbonyl-dicyclohexylamine) l-amino4-ethoxybenzene-5-(sulionyl-diethylamine) 1-amino-2-methoxybenzene-5- (sul ionyl-n-dibntylamine) 1 amino 2 methoxybenzcne 5 -(sulfonyl N methylbenzyl amine 1-amino-2-metl1oxybenzene-5- (sulfonyl-dibenzylamine) l-amino-2-methoxybenzene-fi-(sulfonyl-diethylamine) l-amino-Zethoxybenzene-5-(sulfonyl-dimethylamine) 1 amino 2 methoxybenzene 5 (sultonyl N -bel1ZYlal'I1lll0 benzene). l-amino-2-methoxybenzene-5-(carbonyl-N-carbazole) l-amino-2-chlorobenzene-5-(carbonyl-N-pipcridine) l-amino-4-n1ethcxybenzene-5-(sulionyl-n-dibutylamine) Yellow. Do. Reddish-yellow.

- .do -phgnyl-5-pyrazolone-Ii-carboxylic acid ethyl ester o do Diazdcompound from- Coupled with- Shade 37 l-amino-Z-TnethoXybenzene-5-(sulfonyl-n-dibutylamine) 1-(4-methyl)phenyl-3-methy15-pyrazolone Yellow. 38 l-amino-4-methylbenzene-5-(sulfonyl-diethylamlne) do 39 l-ami110-2.5-dimethoxybenzene-4-(sulfonyl-n-dibutylamine) 40 l-amino-Z.5-climethoxybenzene4'(sulfonyl-n-dibutylamine) l. 41 1-amino-2-methylbenzene-5-(sulfonyl-diethylamine) 42 l-aminobenzene-4-(carbonyl-diethylamine) 43 l-amino-2.ddimethoxybenzene-l-(sulfonyl-n- 45 -amino-2-niethoxyhenzene-5-(sullonyl-diethylamine) e .do l-(2chloro) phenyl-3-methyl-5-pyrazolono do ya l-(4-chlor0)-pl1enyl-El-methyl-S-pyrazolonc. 44 l-amino-4-ethoxybenzene-5-(sulfonyl-n-dibutylamine) l-(2a5-dichloro)-phenyl-3-methyl-5-pyrazolon Do. Reddish-yellow.

Yellow.

Do. Reddisli-yellow. Yellow.

wherein X1 stands for a member of the group consisting of hydrogen, alkyl, alkoxy, benzyloxy, phenoxy and halogen, X2 and X2 stand for members of the group consisting of hydrogen, alkyl, alkoxy, benzyloxy, phenoxy, halogen, the group and the group always one of the two substituents X2 and Xe, not both simultaneously, being one of the groups 1 SO2N and 1 -CON R1 and R2 being members of the group consisting of alkyl, benzyl, radicals of the benzene and naphthalene series and hydroaromatic radicals, which may be connected in a heterocyclic ring system, Y stands for a member of the group consisting of methyl, carboxylic acid ester and phenyl, and -Z for a radical of the benzene series, being insoluble in water, but very easily soluble in organic solvents and yielding vivid yellow and orange tints of good properties of fastness, especially of good fastness to light.

2. The water-insoluble monoazo dyestuff of the following formula:

CHPCH;

0 ON CH2 CHPCH:

being a yellow powder which dissolves easily in organic solvents, such as acetone, xylene, butyl acetate, butyl alcohol and colors, for instance, cellulose ester lacquers vivid fast tints.

3. The water-insoluble monoazo dyestufi of the following formula:

being a yellow powder which dissolves easily in organic solvents, such as acetone, xylene, butyl acetate, butyl alcohol and colors, for instance, cellulose ester lacquers vivid reddish-yellow tints.

4. The water-insoluble monoazo dyestuif of the formula:

being a yellow powder which dissolves easily in organic solvents, such as acetone, xylene, butyl acetate, butyl alcohol, and colors, for instance, cellulose esterlacquers vivid reddish-yellow tints.

ERNST FISCHER. 

